diff --git a/server/vbv_lernwelt/shop/views.py b/server/vbv_lernwelt/shop/views.py
index 8e698262..ea752b23 100644
--- a/server/vbv_lernwelt/shop/views.py
+++ b/server/vbv_lernwelt/shop/views.py
@@ -19,11 +19,11 @@ from vbv_lernwelt.shop.const import (
 )
 from vbv_lernwelt.shop.models import CheckoutInformation, CheckoutState, Product
 from vbv_lernwelt.shop.services import (
+    InitTransactionException,
     create_context_data_log,
     datatrans_state_to_checkout_state,
     get_payment_url,
     init_datatrans_transaction,
-    InitTransactionException,
     is_signature_valid,
 )